Re: git 2.11.0 error when pushing to remote located on a windows share

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On Fri, Dec 02, 2016 at 05:37:50PM -0500, Jeff King wrote:
> On Fri, Dec 02, 2016 at 06:02:16PM +0000, thomas.attwood@xxxxxxxxxx wrote:
> 
> > After updating git from 2.10.0 to 2.11.0 when trying to push any
> > changes to a repo located in a windows share, the following error
> > occurs:
> > 
> > $ git push origin test
> > Counting objects: 2, done.
> > Delta compression using up to 8 threads.
> > Compressing objects: 100% (2/2), done.
> > Writing objects: 100% (2/2), 284 bytes | 0 bytes/s, done.
> > Total 2 (delta 1), reused 1 (delta 0)
> > remote: error: object directory /path/to/dir/objects does not exist; check .git/objects/info/alternates.
> > remote: fatal: unresolved deltas left after unpacking
> > error: unpack failed: unpack-objects abnormal exit
> > To //path/to/dir
> >  ! [remote rejected] test -> test (unpacker error)
> > error: failed to push some refs to '//path/to/dir'
> 
> Hmm. This is probably related to the quarantine-push change in v2.11;
> the receiving end will write the objects into a temporary directory but
> point to the original via GIT_ALTERNATE_OBJECT_DIRECTORIES. That pointer
> isn't working for some reason, so the receiver can't resolve the deltas
> it needs.
> 
> As you noted, the extra "/" is missing in the error message, and that
> sounds like a plausible cause for what you're seeing. I'm not sure where
> the slash is getting dropped, though. The value in the environment comes
> from calling absolute_path(get_object_directory()), so I suspect the
> real problem is not in the quarantine code, but it's just triggering a
> latent bug elsewhere (either in absolute_path(), or in the code which
> generates the objdir path).
> 
> > No error occurs if pushing to the same repo (a direct copy into a local directory) using 2.11.0.
> > 
> > $ git push local_test test
> > Counting objects: 2, done.
> > Delta compression using up to 8 threads.
> > Compressing objects: 100% (2/2), done.
> > Writing objects: 100% (2/2), 284 bytes | 0 bytes/s, done.
> > Total 2 (delta 1), reused 1 (delta 0)
> > To C:/path/to/dir
> >  * [new branch]      test -> test
> 
> The fact that it works using the non-UNC path reinforces my feeling that
> something is normalizing the absolute path incorrectly.
> 
> > Using `git fsck --full` in both 2.11.0 and 2.10.0, it doesn't reveal any additional problems.
> 
> Yeah, I don't think there is anything wrong with your repo. It's just a
> path-building issue internal to the receiving process.
> 

There seems to be another issue, which may or may not being related:
https://github.com/git-for-windows/git/issues/979

This is pure speculation:
Could it be that a '/' is lost because of a change in the underlying
Msys2 between 2.10 and 2.11 ?

Dscho, (or anybody else) any ideas? 




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